Altec Lansing LF115-8A LF SPEAKER SYSTEM Guide de l'utilisateur
FREQUENCY RESPONSE 1, 2
48 Hz - 800 Hz (±3 dB)
USABLE LOW FREQUENCY LIMIT (-10 dB) 1, 2
38 Hz
SENSITIVITY 3
100 dB SPL
POWER HANDLING 4
250 W continuous; 1,000 W peak
MAXIMUM OUTPUT (1 m) 5
124 dB SPL continuous, 130 dB SPL peak
TRANSDUCER COMPONENTS
1x 15 in. Woofer in a Vented Enclosure (4156-8A)
IMPEDANCE 7
Nominal: 8.0 Ohms
Minimum: 6.5 Ohms at 45 Hz
CROSSOVER FREQUENCY
Passive LF - HF: 200 Hz
HARMONIC DISTORTION 8
1% rated power 10% rated power
2nd Harmonic 0.33% 2nd Harmonic 1.40%
3rd Harmonic 0.36% 3rd Harmonic 0.61%
THD 0.65% THD 1.87%
INPUT CONNECTIONS
1x 2 position barrier strip and 2x NL4
High Pass Output: 1x 2 position barrier strip and 1x NL4
CONTROLS
Low Pass On/Off switch
High Pass On/Off switch
ENCLOSURE MATERIALS & FINISH
18 mm, 13 ply Poplar Plywood Finished with
Charcoal Grey or White Catalyzed Polyurethane
SUSPENSION SYSTEM 9
Working Load Limit (maximum weight applied to
uppermost mounting point): 250 lbs. (113.6 kg)
(12) 3/8 in.-16 Threaded Mounting Suspension Points
(3 each top & bottom and 2 each sides & back)
DIMENSIONS
30.50 in. (H) x 20.00 in. (W) x 16.25 in. (D)
775 mm (H) x 508 mm (W) x 413 mm (D)
WEIGHT
Net: 75 lbs. (34.1 kg)
Shipping: 90 lbs. (40.9 kg)
LF115-8A
FEATURES - THE ALTEC LANSING DIFFERENCE
• High Fidelity 15” / 380 mm Low Frequency Speaker
• High Performance 250 W AES / 1,000 W Peak Power Handling
• Onboard Crossover Network with High Pass Output
• Durable 18 mm/13-Ply Poplar Cabinet Provides Easy System
Expansion
• Internal Flying Points Allow Vertical Or Horizontal Suspension
• Forged Eyebolt Hardware Kit Included
• Cloth Covered Perforated Steel Grille
• Neutral Grille Cloth Included For Custom Color Matching
• Barrier Strip And Neutrik®Speakon®Input and High Pass
Output Connectors
• Available In Charcoal Grey Or White Finishes
GENERAL PRODUCT DESCRIPTION
The LF115-8A is the perfect low frequency companion for the
DS912-8A. Equipped with a 15 inch / 380 mm low frequency
speaker housed in a durable 18 mm / 13-Ply Poplar cabinet, the
LF115-8A offers affordable system expansion in an easy-to-install
package. The LF115-8A will complement the low frequency
performance in Auditorium and House of Worship systems.
Altec Lansing’s high performance model 4156-8A woofer is a 15
inch / 380 mm speaker with a robust corrosion-resistant die-cast
frame and a weather-resistant cone for maximum durability in all
environments.
The unique on-board crossover network provides simplistic add-
on operation without the need for an additional power amplifier
channel or the costs associated with additional amplification and
an active crossover. The charcoal grey or white painted cabinet
blends into most backgrounds, or it can be easily painted to
match any décor. Altec Lansing includes neutral grille cloth with
each speaker, allowing you to dye the cloth to integrate the
speaker into the surroundings. The cabinet also features internal
hanging points to facilitate permanent installation in either a
horizontal or vertical orientation.
PROFESSIONAl
1000 W. Wilshire Blvd., Suite 362 • Oklahoma City, Oklahoma 73116 • Phone: 1-405-848-3108 • Fax: 1-405-848-3217 • www.altecpro.com
ARCHITECTS & ENGINEERS SPECIFICATION
The loudspeaker system shall be a low frequency multi-
purpose type consisting of a 15 inch / 380 mm cast frame
loudspeaker component with a weather resistant cone.
The internal passive crossover network shall be a
switchable dual-section, 12 dB/octave slope low pass and
12 dB/octave slope high pass with an electro-acoustic
crossover frequency of 200 Hz. The loudspeaker system
shall have an operating bandwidth of 48 Hz - 800 Hz with
a sensitivity of 100 dB when measured at a distance of one
meter. The power handling capability shall be 250 W AES
(1,000 W peak). Nominal impedance shall be 8 ohms with
a minimum impedance of 6.5 ohms at 45 Hz. The unit
shall be a Vented Enclosure, constructed of 18 mm Poplar
plywood painted charcoal grey or white with a cloth
covered metal grille. The cabinet shall include integral
suspension points. Forged shoulder machinery eye bolts
shall be included to facilitate the suspension of the
speaker system. The dimensions shall be 30.50 inches high
by 20.00 inches wide by 16.25 inches deep. The
loudspeaker system shall weigh 75 pounds (34.1 kg). The
loudspeaker system shall be the Altec Lansing Professional
model LF115-8A.
INPUT
INPUT
ON
LOW
PASS
FILTER
HIGH
PASS
FILTER
PIN 1 +
HIGH PASS OUTPUT
8 OHMS
8 OHMS
HIGH PASS OUTPUT
If HP Output
is not used,
the HP Filter
must be
turned off.
ON
OFF OFF
Altec Lansing Professional
Oklahoma City, OK 73116
A division of Altec Lansing Technologies, Inc., Milford, PA 18337-0277 • Made in China
LF115-8A
+-
+-
PIN 1 -
PIN 1 +
PIN 1 -
INPUT PLATE
As we are continually striving to improve Altec Lansing products, specifications are subject to change without notice.
Please visit www.altecpro.com for the latest information on Altec Lansing Professional Products.
AP1100 REV01
© 2003 Altec Lansing Professional
1000 W. Wilshire Blvd., Suite 362
Oklahoma City, Oklahoma 73116
Phone: 1-405-848-3108 • Fax: 1-405-848-3217
Web: www.altecpro.com • Email: [email protected]
PROFESSIONAl
19.94 [506.40]
DIMENSIONS ARE IN INCHES.
DIMENSIONS SHOWN IN ( ) PARENTHESES ARE IN MILLIMETERS.
DENOTES CENTER OF MASS
16.22 [412.00]
7.24 [184.0
0]
6.98 [177.4
0]
30.56 [776.20]
1.71 [43.45]
7.87 [200.00]
9.97 [253.20]
7.87 [200.00]
1.71 [43.45]
7.87 [200.00]
13.78 [350.00]
1.71 [43.45]
7.87 [200.00]
MOUNTING DIMENSIONS
SPECIFICATION NOTES
1 The frequency response of the loudspeaker system is measured at a distance of no less than 3 meters to obtain full range data. The level is
then corrected to be equivalent to a 2.83 V 1 m measurement. A near field measurement of the loudspeaker system is performed for
frequencies below 500 Hz. This data is then combined with the full range measurement to give an accurate composite frequency response
curve.
2 The limits of the frequency response are referenced to -3 dB of the systems rated sensitivity.
3 The sensitivity of the loudspeaker system is the log based average SPL taken over the intended bandwidth of operation for the system with a
2.83 V swept sine stimulus. The data is measured and level corrected in a manner consistent with note 1.
4 The power handling capacity of the loudspeaker system is tested using AES Standard 2-1984. The test stimulus is band limited (30 Hz – 300
Hz) pink noise with a 6 dB crest factor. The applied RMS voltage is determined using the minimum impedance of the system. The amplifier
used to drive the system has a minimum operating headroom of 6 dB referenced to the RMS voltage.
5 The maximum output level of the loudspeaker system is calculated based on the sensitivity and the power handling capabilities of the
system.
7 The minimum impedance of the loudspeaker system is taken over its intended band of operation.
8 The distortion measurements of the loudspeaker system are performed at a distance of 1 m with RMS input voltages corresponding to 1%
and 10% of rated system power handling calculated using minimum system impedance. The distortion percentages are log based averages
from 40 Hz – 300 Hz.
9 Before attempting to suspend the loudspeaker system, consult a certified structural engineer. This loudspeaker system can fall from
improper suspension, resulting in serious injury and property damage. Maximum enclosure rigging angle is 45°. Use only the correct mating
hardware, forged shoulder machinery eye bolt, Mil Spec MIL 51937-3. All associated rigging is the responsibility of others.
VISIT WWW.ALTECPRO.COM FOR
• Authorized EASE®data on all Altec Lansing Professional speakers.
• Specification sheets in .pdf format. Download page 1 of the specification sheet for your submittals.
• One paragraph A & E Specifications in .doc format
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